| Top 10 warmest Januaries |
| Rank |
Value |
Year(s) |
| 1 |
43.2 |
2006 |
| 2 |
42.5 |
1933 |
| 3 |
41.4 |
1923 |
| 4 |
40.5 |
1939 |
| 5 |
39.5 |
1990 |
| 6 |
39.1 |
1921 |
| 7 |
39.0 |
1931, 1992 |
| 8 |
38.5 |
1914, 1989 |
| 9 |
38.1 |
1986 |
| 10 |
37.9 |
2012 |
|
| Top 10 driest Januaries |
| Rank |
Value |
Year(s) |
| 1 |
0.00 |
1986, 1919, 1914 |
| 2 |
0.02 |
1961, 1923, 1911 |
| 3 |
0.03 |
1994, 2012 |
| 4 |
0.04 |
1976 |
| 5 |
0.08 |
2009, 1903 |
| 6 |
0.09 |
1954 |
| 7 |
0.10 |
1996, 1933, 1928, 1900 |
| 8 |
0.11 |
2006 |
| 9 |
0.12 |
2003, 1938, 1912, 1904 |
| 10 |
0.14 |
1968 |
|